Malicious PDF — malware analysis report

Static analysis result for SHA-256 de96a85b8d5a628e…

MALICIOUS

PDF

52.3 KB Created: 2020-08-17 14:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71ca05d74930e25b8bbd290b40dbebe0 SHA-1: feaeda0bce02434d7ae887301bfb3427fd9bf303 SHA-256: de96a85b8d5a628eadf588cd9c92f41f0a6aacc5327c320e2df5e9baf37d75d2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a deceptive document body and multiple embedded links. One critical heuristic indicates a malicious redirector link pointing to 'ttraff.ru', which is used to obscure the final destination. Another heuristic flags a large number of external PDF links, suggesting a link farm for SEO poisoning or traffic generation. The primary malicious URL is https://ttraff.ru/pify?keyword=checkpoint+firewall+interview+question+and+answer, which likely serves as a lure for job seekers.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=checkpoint+firewall+interview+question+and+answer
    • http://bofakiw.seva4everybody.com/uploads/1/3/0/7/130776031/5451269.pdf
    • http://magekag.salemstitches.com/uploads/1/3/0/7/130776454/tajemupaba.pdf
    • http://lebuniz.ericphotography.net/uploads/1/3/0/8/130874038/kiwenako_zapawomizari_xivetiwuza.pdf
    • http://files.awwe.org/uploads/1/3/1/4/131437421/wadelisi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/sujawowo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0959/files/2_bestanden_samenvoegen_adobe_reader.pdf
    • https://cdn.shopify.com/s/files/1/0433/3587/6776/files/50567396404.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32773531818.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/42356955729.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/68174236991.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7201/files/mixed_conditionals_games.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/bapozu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1145/files/vutezawikijuvemirizeniwov.pdf
    • https://cdn.shopify.com/s/files/1/0431/3071/6314/files/aws_lambda_python_libraries.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/brownie_uniform_placement.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/mama_ntilie.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e08.bin
b87877336a718c39ac0f1666381ac78d71120ba9568e2a929dd06c964dd589c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E08 5492 bytes
font_01_sfnt_off0000a0ba.bin
7a9b5aefe01dc137364c9d539a16d16f332869a765fc4440beea8b58a51985d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0BA 10172 bytes

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